shady user

Need help, sent a $105 dollar payement to a user who's name can be provided, i have all original messages. My problem is he said wednesday that he shipped mask parts to me, but did not provide a tracking number. A day later i asked for said tracking number and was promised after "exams" they would be sent to me. Yesterday i messaged him for said tracking number and he said this afternoon that he shipped it yesterday but again did not provide tracking number..